I'm assuming the study in question is the one where they asked athletes if they were doping and used those answers to come up with the 45%? Give me a break. There's no proof behind that kind of result. It's like asking a survey of letsrunners what their 5K PR is and then saying that 45% of letsrunners can run sub-14.
Actually, 45% might be low, especially if the question were "what percentage of letsrunners believe they could have run sub 14?".